Knocked off bottom part of latch. Ordered it, got it a few days earlier than expected. Took a small flat screwdriver and carefully removed the plastic frame and removed door off hinge. Then carefully lifted out inner door metal part where latch sits in 2 slots. Removed the spring and removed broken latch. Inserted replacement latch, reconnected spring with small needle nose pliers. Lowered inner door, put door on hinges and replaced plastic frame. Problem solved. 15 minutes. I had already replaced the outer door handle on a previous occasion so I knew how to do all this.